how many gigabytes in a terabyte?
Correctly. It is a simple question.
As a student, you start by - yuorself - finding the answer to simple questions. As you learn, you will be able to answer harder and harder questions.
Letting someone else supply the answers - even to the simple questions - will obviously not let you progress to the next level of knowledge.
Do you want to spend the rest of your life unable to figure out the scaling factor between a gigabyte and a terabyte? Terabyte disks are available on the shelves right now. But you can't buy one, because you will not be able to figure out if they are expensive or not compared to gigabyte disks until you know how many 1 gigabyte disks, or 10 gigabyte disks or 100 gigabyte disks or 1000 gigabyte disks that are needed to match a single terabyte disk...
Have you located Google yet?